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Stock Dividends (Narrative) (Details) (USD $)	6 Months Ended
Stock Dividends (Narrative) (Details) (USD $)	Jun. 30, 2011	Mar. 31, 2011
Stock Dividends
Common stock issued under stock compensation plan	826,375
Increase in cash dividend rate		$ 0.01
Cash dividend rate	$ 0.12	$ 0.12
Common stock cash dividends	$ 17,174,000

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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